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Size effect of the mode II fracture toughness of rock
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå tekniska universitet.
Central South University of Technology, Changsha.
1999 (English)In: Rock mechanics for industry: proceedings of the 37th US Rock Mechanics Symposium /Vail/Colorado/USA/6-9 June 1999 / [ed] Bernard Amadei, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1999, Vol. Vol. 2, p. 1117-1123Conference paper, Published paper (Refereed)
Abstract [en]

A new method, compression-shear test, has been developed for determining the mode II fracture toughness K (sub IIC) of rock. The effect of the specimen thickness B, the dimensionless notch length a/W as well as the notch inclination angle alpha on the determination of K (sub IIC) has been experimentally studied. The results show that the apparent mode II fracture toughness K (sub c) decreases as B and a/W increase and becomes constant when B> or =70 mm (i.e. cubic specimen) and a/W>0.5. The K (sub c) is almost independent of alpha in the range of 65 degrees -75 degrees . The constant K (sub c) is about 2-3 times that of mode I fracture toughness K (sub IC) and can be considered as the true mode II fracture toughness K (sub IIC) of rock.

Place, publisher, year, edition, pages
Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1999. Vol. Vol. 2, p. 1117-1123
National Category
Other Civil Engineering Metallurgy and Metallic Materials
Research subject
Mining and Rock Engineering; Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-32405Local ID: 6e725950-9128-11dd-b1e5-000ea68e967bISBN: 90-5809-100-7 (print)OAI: oai:DiVA.org:ltu-32405DiVA, id: diva2:1005639
Conference
U.S. Rock Mechanics Symposium : 06/06/1999 - 09/06/1999
Note

Godkänd; 1999; 20081003 (andbra)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-05Bibliographically approved

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Rao, K. Hanumantha

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